Abstract
This work was conducted to evaluate the impact of raising height of cutting at harvest (from 11 cm for normal cut to 33 cm for high cut) at three stages of kernels maturity just denting (JD), ½ milk line (½ ML), and Black layer (BL) on DM yield, composition and digestibility of whole-plant corn silage (WPCS) for sheep. One type of corn hybrid was harvested either at JD (early WPC); ½ ML (mid WPC) or BL (late WPC). The cutting height at harvest was altered to leave 11 cm or 33 cm of the stalk in the field. Dry matter yield was determined at harvest. After 40 days of ensiling, WPCS were analyzed to determine silage quality (pH and lactic acid) and chemical composition. Digestion coefficients of the different nutrients was measured in 6 rams. Dry matter yield increased as maturity progressed and decreased by alteration of cutting height. Advancing stage of maturity and increasing the height of cutting raised the concentrations of DM and NFC and reduced contents of NDF, ADF and lignin. Crude protein content decreased with maturity, but not affected by alteration of cutting height. As to the quality of silage, maturity increased the pH value and decreased lactic acid concentration, while alteration of cutting height did not have any effect. Digestion coefficient of DM, CP, NDF and ADF were not affected by maturity. While, that of NFC decreased as the stage of maturity progressed from JD to BL. Height of cutting increased (P < 0.05) the digestibility of NDF and ADF. So delaying maturity of corn and increasing the height of cutting improves nutritive value of its silage.
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Claims 13
Claim · model-written summary
Dry matter yield of whole-plant corn increased as maturity progressed.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- maturity progressede1
- Outcome
- Dry matter yielde1
- Direction
- increasede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One type of corn hybrid was harvested either at JD (early WPC); ½ ML (mid WPC) or BL (late WPC)”
e1“Dry matter yield increased as maturity progressed and decreased by alteration of cutting height”
Claim · model-written summary
Raising the cutting height decreased dry matter yield of whole-plant corn.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- alteration of cutting heighte1
- Outcome
- Dry matter yielde1
- Direction
- decreasede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One type of corn hybrid was harvested either at JD (early WPC); ½ ML (mid WPC) or BL (late WPC)”
e1“Dry matter yield increased as maturity progressed and decreased by alteration of cutting height”
Claim · model-written summary
Advancing maturity and higher cutting raised the concentrations of DM and NFC in silage.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- Advancing stage of maturity and increasing the height of cuttinge2
- Outcome
- concentrations of DM and NFCe2
- Direction
- raisede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One type of corn hybrid was harvested either at JD (early WPC); ½ ML (mid WPC) or BL (late WPC)”
e2“Advancing stage of maturity and increasing the height of cutting raised the concentrations of DM and NFC and reduced contents of NDF, ADF and lignin”
Claim · model-written summary
Advancing maturity and higher cutting reduced the contents of NDF, ADF and lignin in silage.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- Advancing stage of maturity and increasing the height of cuttinge2
- Outcome
- contents of NDF, ADF and lignine2
- Direction
- reducede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One type of corn hybrid was harvested either at JD (early WPC); ½ ML (mid WPC) or BL (late WPC)”
e2“Advancing stage of maturity and increasing the height of cutting raised the concentrations of DM and NFC and reduced contents of NDF, ADF and lignin”
Claim · model-written summary
Crude protein content of corn silage decreased with maturity.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- maturitye3
- Outcome
- Crude protein contente3
- Direction
- decreasede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One type of corn hybrid was harvested either at JD (early WPC); ½ ML (mid WPC) or BL (late WPC)”
e3“Crude protein content decreased with maturity, but not affected by alteration of cutting height”
Claim · model-written summary
Crude protein content of corn silage was not affected by cutting height.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- alteration of cutting heighte3
- Outcome
- Crude protein contente3
- Direction
- not affectede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One type of corn hybrid was harvested either at JD (early WPC); ½ ML (mid WPC) or BL (late WPC)”
e3“Crude protein content decreased with maturity, but not affected by alteration of cutting height”
Claim · model-written summary
Maturity increased the pH value of corn silage.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- maturitye4
- Outcome
- pH valuee4
- Direction
- increasede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One type of corn hybrid was harvested either at JD (early WPC); ½ ML (mid WPC) or BL (late WPC)”
e4“As to the quality of silage, maturity increased the pH value and decreased lactic acid concentration, while alteration of cutting height did not have any effect”
Claim · model-written summary
Maturity decreased the lactic acid concentration of corn silage.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- maturitye4
- Outcome
- lactic acid concentratione4
- Direction
- decreasede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One type of corn hybrid was harvested either at JD (early WPC); ½ ML (mid WPC) or BL (late WPC)”
e4“As to the quality of silage, maturity increased the pH value and decreased lactic acid concentration, while alteration of cutting height did not have any effect”
Claim · model-written summary
Alteration of cutting height did not affect the quality of corn silage.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- alteration of cutting heighte4
- Outcome
- quality of silagee4
- Direction
- did not have any effecte4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One type of corn hybrid was harvested either at JD (early WPC); ½ ML (mid WPC) or BL (late WPC)”
e4“As to the quality of silage, maturity increased the pH value and decreased lactic acid concentration, while alteration of cutting height did not have any effect”
Claim · model-written summary
Digestion coefficients of DM, CP, NDF and ADF were not affected by maturity.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- maturitye5
- Outcome
- Digestion coefficient of DM, CP, NDF and ADFe5
- Direction
- not affectede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One type of corn hybrid was harvested either at JD (early WPC); ½ ML (mid WPC) or BL (late WPC)”
e5“Digestion coefficient of DM, CP, NDF and ADF were not affected by maturity. While, that of NFC decreased as the stage of maturity progressed from JD to BL”
Claim · model-written summary
Digestion coefficient of NFC decreased as maturity progressed from JD to BL.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- stage of maturity progressed from JD to BLe5
- Outcome
- that of NFCe5
- Direction
- decreasede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One type of corn hybrid was harvested either at JD (early WPC); ½ ML (mid WPC) or BL (late WPC)”
e5“Digestion coefficient of DM, CP, NDF and ADF were not affected by maturity. While, that of NFC decreased as the stage of maturity progressed from JD to BL”
Claim · model-written summary
Higher cutting increased the digestibility of NDF and ADF of corn silage.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- Height of cuttinge7
- Outcome
- digestibility of NDF and ADFe7
- Direction
- increasede7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One type of corn hybrid was harvested either at JD (early WPC); ½ ML (mid WPC) or BL (late WPC)”
e7“Height of cutting increased (P < 0.05) the digestibility of NDF and ADF”
Claim · model-written summary
Delaying maturity and increasing cutting height is recommended to improve the nutritive value of corn silage.
- Taxon
- cornZea mays subsp. mayse6
- Treatment
- delaying maturity of corn and increasing the height of cuttinge6
- Outcome
- nutritive value of its silagee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“So delaying maturity of corn and increasing the height of cutting improves nutritive value of its silage”